1. Institute for Safe Medication Practices
ISMP’s List of Confused Drug Names
his list of confused drug names, which includes look-alike and This list also contains the names that appear on The Joint
T sound-alike name pairs, consists of those name pairs that have
been involved in medication errors published in the ISMP
Medication Safety Alert!® and the ISMP Medication Safety Alert!®
Commission’s list of look-alike and sound-alike names. The Joint
Commission established a National Patient Safety Goal that requires
each accredited organization to identify a list of look-alike or sound-
Community/Ambulatory Care Edition. The errors involving these alike drugs used in the organization. Those names that appear on The
medications were reported to ISMP through the ISMP Medication Joint Commission’s list have been noted with an asterisk (*) below.
Errors Reporting Program (MERP).
Drug Name Confused Drug Name Drug Name Confused Drug Name
Abelcet* amphotericin B* amLODIPine aMILoride
Accupril Aciphex amphotericin B* Abelcet*
acetaZOLAMIDE* acetoHEXAMIDE* amphotericin B* Ambisome*
acetic acid for irrigation glacial acetic acid Anacin Anacin-3
acetoHEXAMIDE* acetaZOLAMIDE* Anacin-3 Anacin
Aciphex Accupril antacid Atacand
Aciphex Aricept Antivert Axert
Activase Cathflo Activase Anzemet Avandamet
Activase TNKase Apresoline Priscoline
Actonel Actos argatroban Aggrastat
Actos Actonel argatroban Orgaran
Adacel (Tdap) Daptacel (DTaP) Aricept Aciphex
Adderall Inderal Aricept Azilect
Adderall Adderall XR aripiprazole proton pump inhibitors
Adderall XR Adderall aripiprazole rabeprazole
Advair* Advicor* Asacol Os-Cal
Advicor* Advair* Atacand antacid
Advicor Altocor Atrovent Natru-Vent
Afrin (oxymetazoline) Afrin (saline) Avandamet Anzemet
Afrin (saline) Afrin (oxymetazoline) Avandia Prandin
Aggrastat argatroban Avandia* Coumadin*
Aldara Alora AVINza INVanz
Alkeran Leukeran AVINza* Evista*
Alkeran Myleran Axert Antivert
Allegra Viagra azaCITIDine azaTHIOprine
Alora Aldara azaTHIOprine azaCITIDine
ALPRAZolam* LORazepam* Azilect Aricept
Altocor Advicor B & O (belladonna and opium) Beano
amantadine amiodarone BabyBIG HBIG (hepatitis B immune globulin)
Amaryl Reminyl Bayhep-B Bayrab
Ambisome* amphotericin B* Bayhep-B Bayrho-D
Amicar* Omacor* Bayrab Bayhep-B
Amikin Kineret Bayrab Bayrho-D
©ISMP 2010
aMILoride amLODIPine Bayrho-D Bayhep-B
amiodarone amantadine Bayrho-D Bayrab
* These drug names are included on The Joint Commission’s list of look-alike or sound-alike drug names from which an accredited organization creates it own list to satisfy the requirements of
the National Patient Safety Goals. Visit www.jointcommission.org for more information about this Joint Commission requirement.
Permission is granted to reproduce material for internal newsletters or communications with proper attribution. Other
reproduction is prohibited without written permission. Unless noted, reports were received through the ISMP Medication
Errors Reporting Program (MERP). Report actual and potential medication errors to the MERP via the web at Institute for Safe
www.ismp.org/merp or by calling 1-800-FAIL-SAF(E). ISMP is a federally certified patient safety organization (PSO), Medication Practices
providing legal protection and confidentiality for patient safety data and error reports it receives.
www.ismp.org
1

2. Institute for Safe Medication Practices
ISMP’s List of Confused Drug Names
Drug Name Confused Drug Name Drug Name Confused Drug Name
Beano B & O (belladonna and opium) Clindesse Clindets
Benadryl benazepril Clindets Clindesse
benazepril Benadryl clomiPHENE clomiPRAMINE
Benicar Mevacor clomiPRAMINE clomiPHENE
Betadine (with providone-iodine) Betadine (without providone-iodine) clonazePAM cloNIDine
Betadine (without providone-iodine) Betadine (with providone-iodine) clonazePAM LORazepam
Bextra Zetia cloNIDine clonazePAM
Bicillin C-R Bicillin L-A cloNIDine* KlonoPIN*
Bicillin L-A Bicillin C-R Clozaril Colazal
Bicitra Polycitra Coagulation factor IX (recombinant) Factor IX Complex, Vapor Heated
Brethine Methergine codeine Lodine
Brevibloc Brevital Colace Cozaar
Brevital Brevibloc Colazal Clozaril
buPROPion busPIRone colchicine Cortrosyn
busPIRone buPROPion Comvax Recombivax HB
Capadex [non-US product] Kapidex Cortrosyn colchicine
Capex Kapidex Coumadin* Avandia*
Carac Kuric Coumadin* Cardura*
captopril carvedilol Cozaar Colace
carBAMazepine OXcarbazepine Cozaar Zocor
CARBOplatin CISplatin cycloSERINE cycloSPORINE
Cardura* Coumadin* cycloSPORINE cycloSERINE
carvedilol captopril Cymbalta Symbyax
Casodex Kapidex DACTINomycin DAPTOmycin
Cathflo Activase Activase Daptacel (DTaP) Adacel (Tdap)
Cedax Cidex DAPTOmycin DACTINomycin
ceFAZolin cefTRIAXone Darvocet* Percocet*
cefTRIAXone ceFAZolin Darvon Diovan
CeleBREX* CeleXA* DAUNOrubicin* DAUNOrubicin citrate liposomal*
CeleBREX* Cerebyx* DAUNOrubicin* DOXOrubicin*
CeleXA ZyPREXA DAUNOrubicin* IDArubicin*
CeleXA* CeleBREX* DAUNOrubicin citrate liposomal* DAUNOrubicin*
CeleXA* Cerebyx* Denavir indinavir
Cerebyx* CeleBREX* Depakote Depakote ER
Cerebyx* CeleXA* Depakote ER Depakote
cetirizine sertraline Depo-Medrol Solu-MEDROL
chlordiazePOXIDE chlorproMAZINE Depo-Provera Depo-subQ provera 104
chlorproMAZINE chlordiazePOXIDE Depo-subQ provera 104 Depo-Provera
chlorproMAZINE chlorproPAMIDE desipramine disopyramide
chlorproPAMIDE chlorproMAZINE dexmethylphenidate methadone
Cidex Cedax Diabenese Diamox
CISplatin CARBOplatin Diabeta* Zebeta*
Claritin (loratadine) Claritin Eye (ketotifen fumarate) Diamox Diabenese
Claritin-D Claritin-D 24
©ISMP 2010
Diflucan* Diprivan*
Claritin-D 24 Claritin-D Dilacor XR Pilocar
Claritin Eye (ketotifen fumarate) Claritin (loratadine) Dilaudid Dilaudid-5
* These drug names are included on The Joint Commission’s list of look-alike or sound-alike drug names from which an accredited organization creates it own list to satisfy the requirements of
the National Patient Safety Goals. Visit www.jointcommission.org for more information about this Joint Commission requirement.
Permission is granted to reproduce material for internal newsletters or communications with proper attribution. Other
reproduction is prohibited without written permission. Unless noted, reports were received through the ISMP Medication
Errors Reporting Program (MERP). Report actual and potential medication errors to the MERP via the web at Institute for Safe
www.ismp.org/merp or by calling 1-800-FAIL-SAF(E). ISMP is a federally certified patient safety organization (PSO), Medication Practices
providing legal protection and confidentiality for patient safety data and error reports it receives.
www.ismp.org
2

3. Institute for Safe Medication Practices
ISMP’s List of Confused Drug Names
Drug Name Confused Drug Name Drug Name Confused Drug Name
Dilaudid-5 Dilaudid Fiorinal Fioricet
dimenhyDRINATE diphenhydrAMINE flavoxate fluvoxamine
diphenhydrAMINE dimenhyDRINATE Flonase Flovent
Dioval Diovan Flovent Flonase
Diovan Dioval flumazenil influenza virus vaccine
Diovan Zyban FLUoxetine PARoxetine
Diovan Darvon FLUoxetine DULoxetine
Diprivan* Diflucan* fluvoxamine flavoxate
Diprivan Ditropan Folex Foltx
disopyramide desipramine folic acid* folinic acid (leucovorin calcium)*
Ditropan Diprivan folinic acid (leucovorin calcium)* folic acid*
DOBUTamine DOPamine Foltx Folex
DOPamine DOBUTamine fomepizole omeprazole
Doxil Paxil Foradil Fortical
DOXOrubicin* DAUNOrubicin* Foradil Toradol
DOXOrubicin* DOXOrubicin liposomal* Fortical Foradil
DOXOrubicin* IDArubicin* gentamicin gentian violet
DOXOrubicin liposomal* DOXOrubicin* gentian violet gentamicin
Dulcolax (bisacodyl) Dulcolax (docusate sodium) glacial acetic acid acetic acid for irrigation
Dulcolax (docusate sodium) Dulcolax (bisacodyl) glipiZIDE glyBURIDE
DULoxetine FLUoxetine glyBURIDE glipiZIDE
Durasal Durezol Granulex Regranex
Durezol Durasal guaiFENesin guanFACINE
Duricef Ultracet guanFACINE guaiFENesin
Dynacin Dynacirc HBIG (hepatitis B immune globulin) BabyBIG
Dynacirc Dynacin Healon Hyalgan
edetate calcium disodium edetate disodium heparin* Hespan*
edetate disodium edetate calcium disodium Hespan* heparin*
Effexor* Effexor XR* HMG-CoA Reductase Inhibitors ("statins") nystatin
Effexor XR* Effexor* HumaLOG* HumuLIN*
Enbrel Levbid HumaLOG* NovoLOG*
Engerix-B adult Engerix-B pediatric/adolescent HumaLOG Mix 75/25 HumuLIN 70/30
Engerix-B pediatric/adolescent Engerix-B adult Humapen Memoir (for use with HumaLOG) Humira Pen
Enjuvia Januvia Humira Pen Humapen Memoir (for use with HumaLOG)
ePHEDrine* EPINEPHrine* HumuLIN* NovoLIN*
EPINEPHrine* ePHEDrine* HumuLIN* HumaLOG*
Estratest Estratest HS HumuLIN 70/30 HumaLOG Mix 75/25
Estratest HS Estratest Hyalgan Healon
ethambutol Ethmozine hydrALAZINE* hydrOXYzine*
Ethmozine ethambutol HYDROcodone* oxyCODONE*
Evista* AVINza* Hydrogesic hydrOXYzine
Factor IX Complex, Vapor Heated Coagulation factor IX (recombinant) HYDROmorphone* morphine*
Femara Femhrt hydrOXYzine Hydrogesic
©ISMP 2010
Femhrt Femara hydrOXYzine* hydrALAZINE*
fentaNYL SUFentanil IDArubicin* DAUNOrubicin*
Fioricet Fiorinal IDArubicin* DOXOrubicin*
* These drug names are included on The Joint Commission’s list of look-alike or sound-alike drug names from which an accredited organization creates it own list to satisfy the requirements of
the National Patient Safety Goals. Visit www.jointcommission.org for more information about this Joint Commission requirement.
Permission is granted to reproduce material for internal newsletters or communications with proper attribution. Other
reproduction is prohibited without written permission. Unless noted, reports were received through the ISMP Medication
Errors Reporting Program (MERP). Report actual and potential medication errors to the MERP via the web at Institute for Safe
www.ismp.org/merp or by calling 1-800-FAIL-SAF(E). ISMP is a federally certified patient safety organization (PSO), Medication Practices
providing legal protection and confidentiality for patient safety data and error reports it receives.
www.ismp.org
3

4. Institute for Safe Medication Practices
ISMP’s List of Confused Drug Names
Drug Name Confused Drug Name Drug Name Confused Drug Name
Inderal Adderall Lariam Levaquin
indinavir Denavir Lasix Luvox
inFLIXimab riTUXimab Lente Lantus
influenza virus vaccine flumazenil leucovorin calcium* Leukeran*
influenza virus vaccine tuberculin purified protein derivative (PPD) Leukeran Alkeran
Inspra Spiriva Leukeran Myleran
INVanz AVINza Leukeran* leucovorin calcium*
iodine Lodine Levaquin Lariam
Isordil Plendil Levbid Enbrel
isotretinoin tretinoin levetiracetam levofloxacin
Jantoven Janumet levofloxacin levetiracetam
Jantoven Januvia levothyroxine lamoTRIgine
Janumet Jantoven levothyroxine Lanoxin
Janumet Januvia Lexapro Loxitane
Janumet Sinemet Lipitor Loniten
Januvia Enjuvia Lipitor ZyrTEC
Januvia Jantoven lithium carbonate lanthanum carbonate
Januvia Janumet Lodine codeine
K-Phos Neutral Neutra-Phos-K Lodine iodine
Kaopectate (bismuth subsalcylate) Kaopectate (docusate calcium) Loniten Lipitor
Kaopectate (docusate calcium) Kaopectate (bismuth subsalcylate) Lopressor Lyrica
Kadian Kapidex LORazepam* ALPRAZolam*
Kaletra Keppra LORazepam clonazePAM
Kapidex Capadex [non-US product] LORazepam Lovaza
Kapidex Capex Lotronex Protonix
Kapidex Casodex Lovaza LORazepam
Kapidex Kadian Loxitane Lexapro
Keflex Keppra Loxitane Soriatane
Keppra Kaletra Lunesta Neulasta
Keppra Keflex Lupron Depot-3 Month Lupron Depot-Ped
Ketalar ketorolac Lupron Depot-Ped Lupron Depot-3 Month
ketorolac Ketalar Luvox Lasix
ketorolac methadone Lyrica Lopressor
Kineret Amikin Maalox Maalox Total Stomach Relief
KlonoPIN* cloNIDine * Maalox Total Stomach Relief Maalox
Kuric Carac Matulane Materna
Kwell Qwell Materna Matulane
LaMICtal LamISIL Maxzide Microzide
LamISIL LaMICtal Menactra Menomune
lamiVUDine* lamoTRIgine* Menomune Menactra
lamoTRIgine* lamiVUDine* Mephyton methadone
lamoTRIgine levothyroxine Metadate methadone
Lanoxin levothyroxine Metadate CD Metadate ER
©ISMP 2010
Lanoxin naloxone Metadate ER Metadate CD
lanthanum carbonate lithium carbonate Metadate ER methadone
Lantus Lente metFORMIN* metroNIDAZOLE*
* These drug names are included on The Joint Commission’s list of look-alike or sound-alike drug names from which an accredited organization creates it own list to satisfy the requirements of
the National Patient Safety Goals. Visit www.jointcommission.org for more information about this Joint Commission requirement.
Permission is granted to reproduce material for internal newsletters or communications with proper attribution. Other
reproduction is prohibited without written permission. Unless noted, reports were received through the ISMP Medication
Errors Reporting Program (MERP). Report actual and potential medication errors to the MERP via the web at Institute for Safe
www.ismp.org/merp or by calling 1-800-FAIL-SAF(E). ISMP is a federally certified patient safety organization (PSO), Medication Practices
providing legal protection and confidentiality for patient safety data and error reports it receives.
www.ismp.org
4

5. Institute for Safe Medication Practices
ISMP’s List of Confused Drug Names
Drug Name Confused Drug Name Drug Name Confused Drug Name
methadone dexmethylphenidate Neurontin Noroxin
methadone ketorolac Neutra-Phos-K K-Phos Neutral
methadone Mephyton NexAVAR NexIUM
methadone Metadate NexIUM NexAVAR
methadone Metadate ER niCARdipine NIFEdipine
methadone methylphenidate NIFEdipine niCARdipine
Methergine Brethine NIFEdipine niMODipine
methimazole metolazone niMODipine NIFEdipine
methylphenidate methadone Norcuron Narcan
metolazone methimazole Normodyne Norpramin
metoprolol succinate metoprolol tartrate Noroxin Neurontin
metoprolol tartrate metoprolol succinate Norpramin Normodyne
metroNIDAZOLE* metFORMIN* Norvasc Navane
Mevacor Benicar NovoLIN* HumuLIN*
Micronase Microzide NovoLIN* NovoLOG*
Microzide Maxzide NovoLIN 70/30* NovoLOG Mix 70/30*
Microzide Micronase NovoLOG* HumaLOG*
midodrine Midrin NovoLOG* NovoLIN*
Midrin midodrine NovoLOG FLEXPEN NovoLOG Mix 70/30 FLEXPEN
mifepristone misoprostol NovoLOG Mix 70/30 FLEXPEN NovoLOG FLEXPEN
Miralax Mirapex NovoLOG Mix 70/30* NovoLIN 70/30*
Mirapex Miralax nystatin HMG-CoA Reductase Inhibitors ("statins")
misoprostol mifepristone Occlusal-HP Ocuflox
morphine* HYDROmorphone* Ocuflox Occlusal-HP
morphine - non-concentrated oral liquid* morphine - oral liquid concentrate* OLANZapine QUEtiapine
morphine - oral liquid concentrate* morphine - non-concentrated oral liquid* Omacor* Amicar*
Motrin Neurontin omeprazole fomepizole
MS Contin* OxyCONTIN* opium tincture* paregoric (camphorated tincture of opium)*
Mucinex* Mucomyst* Oracea Orencia
Mucinex D Mucinex DM Orencia Oracea
Mucinex DM Mucinex D Orgaran argatroban
Mucomyst* Mucinex* Ortho Tri-Cyclen Ortho Tri-Cyclen LO
Myleran Alkeran Ortho Tri-Cyclen LO Ortho Tri-Cyclen
Myleran Leukeran Os-Cal Asacol
naloxone Lanoxin OXcarbazepine carBAMazepine
Narcan Norcuron oxyCODONE* HYDROcodone*
Natru-Vent Atrovent oxyCODONE* OxyCONTIN*
Navane Norvasc OxyCONTIN* MS Contin*
Neo-Synephrine (oxymetazoline) Neo-Synephrine (phenylephrine) OxyCONTIN* oxyCODONE*
Neo-Synephrine (phenylephrine) Neo-Synephrine (oxymetazoline) paclitaxel paclitaxel protein-bound particles
Neulasta Lunesta paclitaxel protein-bound particles paclitaxel
Neulasta Neumega Pamelor Panlor DC
Neumega Neupogen Pamelor Tambocor
©ISMP 2010
Neumega Neulasta Panlor DC Pamelor
Neupogen Neumega paregoric (camphorated tincture of opium)* opium tincture*
Neurontin Motrin PARoxetine FLUoxetine
* These drug names are included on The Joint Commission’s list of look-alike or sound-alike drug names from which an accredited organization creates it own list to satisfy the requirements of
the National Patient Safety Goals. Visit www.jointcommission.org for more information about this Joint Commission requirement.
Permission is granted to reproduce material for internal newsletters or communications with proper attribution. Other
reproduction is prohibited without written permission. Unless noted, reports were received through the ISMP Medication
Errors Reporting Program (MERP). Report actual and potential medication errors to the MERP via the web at Institute for Safe
www.ismp.org/merp or by calling 1-800-FAIL-SAF(E). ISMP is a federally certified patient safety organization (PSO), Medication Practices
providing legal protection and confidentiality for patient safety data and error reports it receives.
www.ismp.org
5

6. Institute for Safe Medication Practices
ISMP’s List of Confused Drug Names
Drug Name Confused Drug Name Drug Name Confused Drug Name
Patanol Platinol QUEtiapine OLANZapine
Pavulon Peptavlon quiNIDine quiNINE
Paxil Doxil quiNINE quiNIDine
Paxil Taxol Qwell Kwell
Paxil Plavix rabeprazole aripiprazole
pemetrexed pralatrexate Razadyne Rozerem
Peptavlon Pavulon Recombivax HB Comvax
Percocet* Darvocet* Regranex Granulex
Percocet Procet Reminyl Robinul
PENTobarbital PHENobarbital Reminyl Amaryl
PHENobarbital PENTobarbital Renagel Renvela
Pilocar Dilacor XR Renvela Renagel
Platinol Patanol Reprexain ZyPREXA
Plavix Paxil Restoril Risperdal
Plendil Isordil Retrovir* ritonavir*
pneumococcal 7-valent vaccine pneumococcal polyvalent vaccine Rifadin Rifater
pneumococcal polyvalent vaccine pneumococcal 7-valent vaccine Rifamate rifampin
Polycitra Bicitra rifampin Rifamate
pralatrexate pemetrexed rifampin rifaximin
Prandin Avandia Rifater Rifadin
Precare Precose rifaximin rifampin
Precose Precare Risperdal Restoril
prednisoLONE predniSONE risperidone ropinirole
predniSONE prednisoLONE Ritalin ritodrine
PriLOSEC* PROzac* Ritalin LA Ritalin SR
Priscoline Apresoline Ritalin SR Ritalin LA
probenecid Procanbid ritodrine Ritalin
Procan SR Procanbid ritonavir* Retrovir*
Procanbid probenecid riTUXimab inFLIXimab
Procanbid Procan SR Robinul Reminyl
Procardia XL Protain XL ropinirole risperidone
Procet Percocet Roxanol Roxicodone Intensol
Prograf PROzac Roxanol Roxicet
propylthiouracil Purinethol Roxicet Roxanol
Proscar Provera Roxicodone Intensol Roxanol
Protain XL Procardia XL Rozerem Razadyne
protamine Protonix Salagen selegiline
proton pump inhibitors aripiprazole SandIMMUNE SandoSTATIN
Protonix Lotronex SandoSTATIN SandIMMUNE
Protonix protamine saquinavir SINEquan
Provera Proscar saquinavir (free base) saquinavir mesylate
Provera PROzac saquinavir mesylate saquinavir (free base)
PROzac Prograf Sarafem Serophene
©ISMP 2010
PROzac* PriLOSEC* selegiline Salagen
PROzac Provera Serophene Sarafem
Purinethol propylthiouracil SEROquel SEROquel XR
* These drug names are included on The Joint Commission’s list of look-alike or sound-alike drug names from which an accredited organization creates it own list to satisfy the requirements of
the National Patient Safety Goals. Visit www.jointcommission.org for more information about this Joint Commission requirement..
Permission is granted to reproduce material for internal newsletters or communications with proper attribution. Other
reproduction is prohibited without written permission. Unless noted, reports were received through the ISMP Medication
Errors Reporting Program (MERP). Report actual and potential medication errors to the MERP via the web at Institute for Safe
www.ismp.org/merp or by calling 1-800-FAIL-SAF(E). ISMP is a federally certified patient safety organization (PSO), Medication Practices
providing legal protection and confidentiality for patient safety data and error reports it receives.
www.ismp.org
6

7. Institute for Safe Medication Practices
ISMP’s List of Confused Drug Names
Drug Name Confused Drug Name Drug Name Confused Drug Name
SEROquel Serzone Testoderm Testoderm with Adhesive
SEROquel SINEquan tetanus diptheria toxoid (Td) tuberculin purified protein derivative (PPD)
SEROquel XR SEROquel Thalomid Thiamine
sertraline cetirizine Thiamine Thalomid
sertraline Soriatane tiaGABine* tiZANidine*
Serzone SEROquel Tiazac Ziac
Sinemet Janumet Ticlid Tequin
SINEquan saquinavir tiZANidine* tiaGABine*
SINEquan SEROquel TNKase Activase
SINEquan Singulair TNKase t-PA
SINEquan Zonegran Tobradex Tobrex
Singulair SINEquan Tobrex Tobradex
sitaGLIPtin SUMAtriptan TOLAZamide TOLBUTamide
Solu-CORTEF Solu-MEDROL TOLBUTamide TOLAZamide
Solu-MEDROL Depo-Medrol Topamax* Toprol-XL*
Solu-MEDROL Solu-CORTEF Toprol-XL* Topamax*
Sonata Soriatane Toradol Foradil
Soriatane Loxitane t-PA TNKase
Soriatane sertraline Tracleer Tricor
Soriatane Sonata traMADol* traZODone*
sotalol Sudafed traZODone* traMADol*
Spiriva Inspra TRENtal TEGretol
Sudafed sotalol tretinoin isotretinoin
Sudafed Sudafed PE Tricor Tracleer
Sudafed PE Sudafed tromethamine Trophamine
SUFentanil fentaNYL Trophamine tromethamine
sulfADIAZINE sulfiSOXAZOLE tuberculin purified protein derivative (PPD) influenza virus vaccine
sulfiSOXAZOLE sulfADIAZINE tuberculin purified protein derivative (PPD) tetanus diptheria toxoid (Td)
SUMAtriptan sitaGLIPtin Tylenol Tylenol PM
SUMAtriptan zolmitriptan Tylenol PM Tylenol
Symbyax Cymbalta Ultracet Duricef
Tambocor Pamelor valacyclovir valganciclovir
Taxol Taxotere Valcyte Valtrex
Taxol Paxil valganciclovir valacyclovir
Taxotere Taxol Valtrex Valcyte
TEGretol TEGretol XR Varivax VZIG (varicella-zoster immuneglobulin)
TEGretol Tequin Vesanoid Vesicare
TEGretol TRENtal Vesicare Vesanoid
TEGretol XR TEGretol Vexol Vosol
Tequin TEGretol Viagra Allegra
Tequin Ticlid vinBLAStine* vinCRIStine*
Testoderm TTS Testoderm vinCRIStine* vinBLAStine*
Testoderm TTS Testoderm with Adhesive Viokase Viokase 8
©ISMP 2010
Testoderm with Adhesive Testoderm Viokase 8 Viokase
Testoderm with Adhesive Testoderm TTS Vioxx Zyvox
Testoderm Testoderm TTS Viracept Viramune
* These drug names are included on The Joint Commission’s list of look-alike or sound-alike drug names from which an accredited organization creates it own list to satisfy the requirements of
the National Patient Safety Goals. Visit www.jointcommission.org for more information about this Joint Commission requirement.
Permission is granted to reproduce material for internal newsletters or communications with proper attribution. Other
reproduction is prohibited without written permission. Unless noted, reports were received through the ISMP Medication
Errors Reporting Program (MERP). Report actual and potential medication errors to the MERP via the web at Institute for Safe
www.ismp.org/merp or by calling 1-800-FAIL-SAF(E). ISMP is a federally certified patient safety organization (PSO), Medication Practices
providing legal protection and confidentiality for patient safety data and error reports it receives.
www.ismp.org
7

8. Institute for Safe Medication Practices
ISMP’s List of Confused Drug Names
Drug Name Confused Drug Name Drug Name Confused Drug Name
Viramune Viracept Zocor Cozaar
Vosol Vexol Zocor* ZyrTEC*
VZIG (varicella-zoster immuneglobulin) Varivax zolmitriptan SUMAtriptan
Wellbutrin SR* Wellbutrin XL* Zonegran SINEquan
Wellbutrin XL* Wellbutrin SR* Zostrix Zovirax
Xanax* Zantac* Zovirax Zyvox
Xeloda Xenical Zovirax Zostrix
Xenical Xeloda Zyban Diovan
Yasmin Yaz ZyPREXA CeleXA
Yaz Yasmin ZyPREXA Reprexain
Zantac* Xanax* ZyPREXA* Zestril*
Zantac* ZyrTEC* ZyPREXA* ZyrTEC*
Zebeta* Diabeta* ZyPREXA Zydis Zelapar (Zydis formulation)
Zebeta Zetia ZyrTEC Lipitor
Zegerid Zestril ZyrTEC* Zantac*
Zelapar (Zydis formulation) ZyPREXA Zydis ZyrTEC* Zocor*
Zestril Zegerid ZyrTEC* ZyPREXA*
Zestril* Zetia* ZyrTEC ZyrTEC-D
Zestril* ZyPREXA* ZyrTEC (cetirizine) ZyrTEC Itchey Eye Drops (ketotifen fumarate)
Zetia Bextra ZyrTEC-D ZyrTEC
©ISMP 2010
Zetia Zebeta ZyrTEC Itchey Eye Drops (ketotifen fumarate) ZyrTEC (cetirizine)
Zetia* Zestril* Zyvox Vioxx
Ziac Tiazac Zyvox Zovirax
* These drug names are included on the The Joint Commission’s list of look-alike or sound-alike drug names from which an accredited organization creates it own list to satisfy the requirements
of the National Patient Safety Goals. Visit www.jointcommission.org for more information about this Joint Commission requirement.
Permission is granted to reproduce material for internal newsletters or communications with proper attribution. Other
reproduction is prohibited without written permission. Unless noted, reports were received through the ISMP Medication
Errors Reporting Program (MERP). Report actual and potential medication errors to the MERP via the web at Institute for Safe
www.ismp.org/merp or by calling 1-800-FAIL-SAF(E). ISMP is a federally certified patient safety organization (PSO), Medication Practices
providing legal protection and confidentiality for patient safety data and error reports it receives.
www.ismp.org
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